Dev Containers: Update GHC.Dockerfile

.devcontainer/GHC.Dockerfile

@@ -109,7 +109,11 @@ RUN if [ -n "$STACK_VERSION_OVERRIDE" ]; then \
     curl -sSLO https://github.com/commercialhaskell/stack/releases/download/v"$STACK_VERSION"/stack-"$STACK_VERSION"-linux-"$(uname -m)".tar.gz.sha256; \
     sha256sum -cs stack-"$STACK_VERSION"-linux-"$(uname -m)".tar.gz.sha256; \
     tar -xzf stack-"$STACK_VERSION"-linux-"$(uname -m)".tar.gz; \
-    mv -f stack-"$STACK_VERSION"-linux-"$(uname -m)"/stack /usr/local/bin/stack; \
+    if dpkg --compare-versions "${GHC_VERSION%.*}" le "9.2"; then \
+      mv -f stack-"$STACK_VERSION"-linux-"$(uname -m)"/stack /usr/bin/stack; \
+    else \
+      mv -f stack-"$STACK_VERSION"-linux-"$(uname -m)"/stack /usr/local/bin/stack; \
+    fi; \
     ## Clean up
     rm -rf /tmp/*; \
   fi

.devcontainer/README.md

@@ -5,7 +5,7 @@ These Dev Containers provide the following tools:
 - The
   [Haskell Toolchain](https://www.haskell.org/ghcup/install/#supported-tools)
   ([GHC](https://www.haskell.org/ghc),
-  [Cabal](https://cabal.readthedocs.io),
+  [Cabal (the tool)](https://cabal.readthedocs.io),
   [Stack](https://docs.haskellstack.org), and
   [HLS](https://haskell-language-server.readthedocs.io))
 - [Git](https://git-scm.com)